Irish Black Russian

1 (1.5 fluid ounce) jigger coffee flavored liqueur

2 (1.5 fluid ounce) jiggers vodka

1 (12 fluid ounce) can or bottle Irish stout beer

1 (12 fluid ounce) can or bottle cola-flavored carbonated beverage

Half-fill a highball glass with ice cubes. Measure in the coffee liqueur and vodka. Pour cola to within 1/2 inch of the top. finish with enough Irish stout to form a head on the top. Stir and serve.